Precalculus Trig Identities

• 2/3

• 4/3

• 3/5

• 4/5

Simplify

• -1

• sin θ

• csc θ

• 1

• csc²θ

• sec²θ

• cscθ

• 1

• csc x

• tan x + 1

• cot x

• cot x + 1

• 2secθ

• cot²θ

• tan²θ

• sec²θ + 1

What happens when you multiply two reciprocal functions?

• You get a pythagorean identity

• It equals 1

• You get a quotient identity

• It equals 0

• csc²θ
• sec²θ
• cscθ
• 1

Simplify

• sin²θ

• cosθ

• tanθ

• 1- sin²θ

Simplify

• secθ

• cos²θ

• sin²θ

Simplify: (secx-1)(secx+1)

Hint: you will need to FOIL first

• tan²x

• sinx

• cot²x

• cosx